package java实验三;
import java.util.Scanner;
public class 程序三 {
	
	public static void main(String [] args)
	{
		final int NUMBER_OF_QUESTIONS = 5 ;
		int correctCount =0;
		int count =0;
		long startTime = System.currentTimeMillis();
		String output = " ";
		Scanner input = new Scanner(System.in);
		while (count < NUMBER_OF_QUESTIONS) {
			int number1 =(int )(Math.random()*10);
			int number2 = (int)(Math.random()*10);
			if(number1<number2)
			{
				int t=number1;
				number1 =number2;
				number2 =t;
				
			}
			System.out.print("What is "+number1+" - "+number2+"? ");
			int answer = input.nextInt();
			if(number1-number2==answer)
			{
				System.out.println("You are correct!");
				correctCount++;
			}
			else
				System.out.println("Your answer is wrong.\n"+ number1+" - "+number2+" should be "+ (number1-number2));
			count++;
			output += "\n" + number1 + "-" + number2 + "=" + answer + ((number1-number2==answer) ? "correct" : "wrong") ;
		}
		long endTime = System.currentTimeMillis();
		long testTime =endTime -startTime;
		System.out.println("Correct count is " + correctCount + "\nTest time is " + testTime/1000 + " seconds\n" + output );
		input.close();
	}
}
